Convection in the mantle is commonly related to plate tectonic
... Convection in the mantle is commonly related to plate tectonic processes, but the primary cause is still under debate. Two forces acting on the plates include convective heat rising from deep in the Earth & the strong gravitational pull on the cold subducting plates. At shallow depths & lower pressu ...
... Convection in the mantle is commonly related to plate tectonic processes, but the primary cause is still under debate. Two forces acting on the plates include convective heat rising from deep in the Earth & the strong gravitational pull on the cold subducting plates. At shallow depths & lower pressu ...
made up of hard metal. it is about 1300 km thick. it is 2% of the
... • There are distinct layers to the earth’s interior. • Heavier elements tend to sink to the core • Lighter elements rise toward the surface • More is known about the crust than the mantle and core. • What we believe is true about the mantle and core comes from studying seismology. ...
... • There are distinct layers to the earth’s interior. • Heavier elements tend to sink to the core • Lighter elements rise toward the surface • More is known about the crust than the mantle and core. • What we believe is true about the mantle and core comes from studying seismology. ...
Chapter 4
... • Convective flow in the mantle is the underlying driving force for plate movement. • Mantle convection and plate tectonics are part of the same system. Warm, buoyant rock rises and “cold” dense rock, e.g. subducting plates, sink. • Plate tectonic movements are ultimately due to unequal heat distri ...
... • Convective flow in the mantle is the underlying driving force for plate movement. • Mantle convection and plate tectonics are part of the same system. Warm, buoyant rock rises and “cold” dense rock, e.g. subducting plates, sink. • Plate tectonic movements are ultimately due to unequal heat distri ...
Plate Tectonics - Helena High School
... Continental Drift was rejected. People rejected the hypothesis because: 1- they believed continents and ocean basins were permanent, fixed features of Earth’s surface 2- Wegener could not explain what forces could cause a continent to move without shattering ...
... Continental Drift was rejected. People rejected the hypothesis because: 1- they believed continents and ocean basins were permanent, fixed features of Earth’s surface 2- Wegener could not explain what forces could cause a continent to move without shattering ...
Final Plate Tectonics Review
... Fill in the blanks below………………….. _____________ ____________________ was a _______________ Who developed the continental drift theory. He noticed that the continents fit together like pieces of a ___________________. Other pieces of evidence used to prove his theory were fossil remains of _________ ...
... Fill in the blanks below………………….. _____________ ____________________ was a _______________ Who developed the continental drift theory. He noticed that the continents fit together like pieces of a ___________________. Other pieces of evidence used to prove his theory were fossil remains of _________ ...
The Theory of Continental Drift
... • Places where two tectonic plates are moving toward each other are convergent boundaries, 3 types. – Oceanic-oceanic – Oceanic-continental – Continental-continental • In subduction zones- one of the two plates descends beneath the other ->this creates a deep-sea trench. – Recycling of the plates be ...
... • Places where two tectonic plates are moving toward each other are convergent boundaries, 3 types. – Oceanic-oceanic – Oceanic-continental – Continental-continental • In subduction zones- one of the two plates descends beneath the other ->this creates a deep-sea trench. – Recycling of the plates be ...
File - Paxson Science
... Make 3 column notes for the following vocabulary words. (9 points) Column headings should be: Term, Definition, Example (in words or pictures) Lithosphere Asthenosphere Continental Crust Oceanic Crust Mantle Core ...
... Make 3 column notes for the following vocabulary words. (9 points) Column headings should be: Term, Definition, Example (in words or pictures) Lithosphere Asthenosphere Continental Crust Oceanic Crust Mantle Core ...
Chapter 8 Plate Tectonics With Video
... 4. Climatic patterns shown by rock layers: Some rock types only form in certain climates, for example coal, which forms in warm, very wet (rainy) environments. If coal is found in a place that is not warm and rainy, then either the climate has changed or the rock has moved. ...
... 4. Climatic patterns shown by rock layers: Some rock types only form in certain climates, for example coal, which forms in warm, very wet (rainy) environments. If coal is found in a place that is not warm and rainy, then either the climate has changed or the rock has moved. ...
Convection and Seafloor Spreading
... Harry Hess influenced by Holmes’ ideas, suggested that deep within the asthenosphere, heated material expands, becomes less dense, rises, and pushes it way up through ridges. It then moves along the base of oceanic plates, pulling the plates in opposite directions. This concept we call Seafloor Sp ...
... Harry Hess influenced by Holmes’ ideas, suggested that deep within the asthenosphere, heated material expands, becomes less dense, rises, and pushes it way up through ridges. It then moves along the base of oceanic plates, pulling the plates in opposite directions. This concept we call Seafloor Sp ...
Review sheet – Oceanography – first midterm
... 7. Which state of matter is USUALLY the densest? In which material is this the exception? 8. Who developed the theory of continental drift? 9. What were his observations that supported his theory? 10. What mechanism did he propose to drive continental drift? 11. Why were his ideas not accepted? 12. ...
... 7. Which state of matter is USUALLY the densest? In which material is this the exception? 8. Who developed the theory of continental drift? 9. What were his observations that supported his theory? 10. What mechanism did he propose to drive continental drift? 11. Why were his ideas not accepted? 12. ...
Essay- choose ONE
... ________ The oldest rocks discovered on the seafloor are 180-200 million years old. ________ The youngest rocks on the seafloor are located at mid-ocean ridges. ________ The pattern of magnetic alignment on both sides of a ridge is similar. ________ The Earth’s crust is comprised of 10 litho ...
... ________ The oldest rocks discovered on the seafloor are 180-200 million years old. ________ The youngest rocks on the seafloor are located at mid-ocean ridges. ________ The pattern of magnetic alignment on both sides of a ridge is similar. ________ The Earth’s crust is comprised of 10 litho ...
Plate Tectonics
... Almost identical patterns of rock layers on different continents is evidence that the rocks were once close together or joined. Why are the continents moving? 4 of 7 ...
... Almost identical patterns of rock layers on different continents is evidence that the rocks were once close together or joined. Why are the continents moving? 4 of 7 ...
Chapter 6 Study Guide
... 1. The rock most commonly found on oceanic crust is 2. The rock most commonly found on continental crust is 3. Which layer of the earth is partially made of magma? 4. Which physical layer of the earth is made up of tectonic plates? 5. Another name for crust is 6. What appears to cause the Earth’s pl ...
... 1. The rock most commonly found on oceanic crust is 2. The rock most commonly found on continental crust is 3. Which layer of the earth is partially made of magma? 4. Which physical layer of the earth is made up of tectonic plates? 5. Another name for crust is 6. What appears to cause the Earth’s pl ...
summing-up - Zanichelli online per la scuola
... constant over time, a mechanism must exist that “consumes” the oceanic crust. ...
... constant over time, a mechanism must exist that “consumes” the oceanic crust. ...
Lecture - Ann Arbor Earth Science
... The original surface of the Earth probably looked much as the Moon’s surface does today. The Earth was probably composed of the same material from its surface all the way to its center. Objects colliding with Earth helped to cause Earth to grow hot enough that heavy elements such as iron and nickel ...
... The original surface of the Earth probably looked much as the Moon’s surface does today. The Earth was probably composed of the same material from its surface all the way to its center. Objects colliding with Earth helped to cause Earth to grow hot enough that heavy elements such as iron and nickel ...
Solid Earth - SchoolNova
... • In the late 19th and early 20th centuries, geologists assumed that the Earth's major features were fixed. • In 1912, Alfred Wegener proposed that up until about 200 million years ago, all of the present continents were joined together into a single super-continent later called Pangea. ...
... • In the late 19th and early 20th centuries, geologists assumed that the Earth's major features were fixed. • In 1912, Alfred Wegener proposed that up until about 200 million years ago, all of the present continents were joined together into a single super-continent later called Pangea. ...
The Structure of the Earth and Plate Tectonics
... subducts underneath the continental lithosphere • Oceanic lithosphere heats and dehydrates as it subsides • The melt rises forming volcanism • E.g. The Andes ...
... subducts underneath the continental lithosphere • Oceanic lithosphere heats and dehydrates as it subsides • The melt rises forming volcanism • E.g. The Andes ...
6.6 NOTES What are some effects of plate tectonics? Objective
... What are some effects of plate tectonics? Objective: Explain how plate tectonics causes changes on Earth’s surface ...
... What are some effects of plate tectonics? Objective: Explain how plate tectonics causes changes on Earth’s surface ...
File
... in constant motion. 12. Plate tectonics theory explains how ____________________________________, ___________________________________, and other geologic events occur. Plates and Boundaries 13. The Earth’s continents are constantly moving due to the motions of the _________________. 14. How does con ...
... in constant motion. 12. Plate tectonics theory explains how ____________________________________, ___________________________________, and other geologic events occur. Plates and Boundaries 13. The Earth’s continents are constantly moving due to the motions of the _________________. 14. How does con ...
Earth`s Structure
... in constant motion. 12. Plate tectonics theory explains how ____________________________________, ___________________________________, and other geologic events occur. Plates and Boundaries 13. The Earth’s continents are constantly moving due to the motions of the _________________. 14. How does con ...
... in constant motion. 12. Plate tectonics theory explains how ____________________________________, ___________________________________, and other geologic events occur. Plates and Boundaries 13. The Earth’s continents are constantly moving due to the motions of the _________________. 14. How does con ...
Lessons 4 and 5 Vocabulary
... Lesson 5 Continued Lithosphere – the cool, solid outer shell of the earth. It consists of the crust and the rigid uppermost part of the mantle and is broken up into segments, or plates. Mantle – the layer of the earth beneath the crust. It is about 2900 km thick, and it makes up about 83 percent of ...
... Lesson 5 Continued Lithosphere – the cool, solid outer shell of the earth. It consists of the crust and the rigid uppermost part of the mantle and is broken up into segments, or plates. Mantle – the layer of the earth beneath the crust. It is about 2900 km thick, and it makes up about 83 percent of ...
Inside Earth Chapter 1 Plate Tectonics Study Guide Notes
... - drilling samples The Theory of Plate Tectonics - Plate tectonics is the geological theory that pieces of Earth’s lithosphere are in constant, slow motion, driven by convection currents in the mantle. Three types of Plate Boundaries 1. Transform boundaries - Place where two plates slip past each ot ...
... - drilling samples The Theory of Plate Tectonics - Plate tectonics is the geological theory that pieces of Earth’s lithosphere are in constant, slow motion, driven by convection currents in the mantle. Three types of Plate Boundaries 1. Transform boundaries - Place where two plates slip past each ot ...
12.1 Evidence for Continental Drift
... There was evidence of different climates, (eg. such as glaciers) on warm continents. Like pieces of a jigsaw puzzle, the continents fit together into one, large whole. ...
... There was evidence of different climates, (eg. such as glaciers) on warm continents. Like pieces of a jigsaw puzzle, the continents fit together into one, large whole. ...
Plate tectonics
Plate tectonics (from the Late Latin tectonicus, from the Greek: τεκτονικός ""pertaining to building"") is a scientific theory that describes the large-scale motion of Earth's lithosphere. This theoretical model builds on the concept of continental drift which was developed during the first few decades of the 20th century. The geoscientific community accepted the theory after the concepts of seafloor spreading were later developed in the late 1950s and early 1960s.The lithosphere, which is the rigid outermost shell of a planet (on Earth, the crust and upper mantle), is broken up into tectonic plates. On Earth, there are seven or eight major plates (depending on how they are defined) and many minor plates. Where plates meet, their relative motion determines the type of boundary; convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries. The lateral relative movement of the plates typically varies from zero to 100 mm annually.Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust. Along convergent boundaries, subduction carries plates into the mantle; the material lost is roughly balanced by the formation of new (oceanic) crust along divergent margins by seafloor spreading. In this way, the total surface of the globe remains the same. This prediction of plate tectonics is also referred to as the conveyor belt principle. Earlier theories (that still have some supporters) propose gradual shrinking (contraction) or gradual expansion of the globe.Tectonic plates are able to move because the Earth's lithosphere has greater strength than the underlying asthenosphere. Lateral density variations in the mantle result in convection. Plate movement is thought to be driven by a combination of the motion of the seafloor away from the spreading ridge (due to variations in topography and density of the crust, which result in differences in gravitational forces) and drag, with downward suction, at the subduction zones. Another explanation lies in the different forces generated by the rotation of the globe and the tidal forces of the Sun and Moon. The relative importance of each of these factors and their relationship to each other is unclear, and still the subject of much debate.